A.一般買賣合同與特種買賣合同 B.現(xiàn)貨買賣合同與期貨買賣合同 C.即時(shí)買賣合同與非即時(shí)買賣合同 D.競(jìng)爭(zhēng)買賣合同與非競(jìng)爭(zhēng)買賣合同